在WCF中返回错误的适当方法

[DataContract]
public class CustomError
{
    [DataMember]
    public string ErrorCode { get; set; }

    [DataMember]
    public string ErrorMessage { get; set; }
}

public string GetData(int value)
{
    if (value < 0)
    {
        CustomError error = new CustomError()
        {
            ErrorCode = "InvalidValue",
            ErrorMessage = "The value must be greater than or equal to 0."
        };

        throw new FaultException<CustomError>(error, "Invalid value");
    }

    // 正常处理逻辑
    return "Success";
}

try
{
    string result = client.GetData(-1);
    Console.WriteLine(result);
}
catch (FaultException<CustomError> ex)
{
    CustomError error = ex.Detail;
    Console.WriteLine("Error Code: " + error.ErrorCode);
    Console.WriteLine("Error Message: " + error.ErrorMessage);
}